Johnson Controls V43BS-3 Regulating Valve

The Johnson Controls V43BS-3 is a 2-inch, heavy-duty pressure actuated water regulating valve engineered for precision head pressure control in water-cooled condensers. Constructed with a red brass body to withstand high-stress environments, this valve is NAVSEA certified, making it the industry standard for naval and marine applications where MIL-spec compliance is mandatory. This model features a four-hole ASME flanged connection and operates within a 70 to 150 PSI range, specifically designed for systems utilizing non-corrosive refrigerants. The 1/4" SAE external flare pressure connection allows for direct sensing of high-side refrigerant pressure, ensuring the condenser water flow is modulated accurately to maintain consistent subcooling and head pressure. As the direct replacement for the V43BS-6, the V43BS-3 provides identical mechanical performance with the added benefit of Naval Systems Command ratings, ensuring seamless integration into existing HVACR piping systems without requiring modification to the mounting footprint.

Technical Specifications & Key Benefits

• NAVSEA Certified: Meets rigorous standards for Naval Systems Command applications, ensuring durability in marine environments.
• Red Brass Construction: High-grade material selection prevents premature failure and handles non-corrosive refrigerants effectively.
• ASME Flanged Body: 2-inch four-hole flanged design provides a secure, leak-proof commercial water valve interface.
• Wide Setpoint Range: Adjustable 70 to 150 PSI range allows for fine-tuning based on specific condenser load requirements.
• Direct V43BS-6 Replacement: Simplifies procurement by serving as the upgraded substitute for legacy V43BS-6 units.

Common Questions

Is the V43BS-3 compatible with seawater applications?
While red brass offers superior resistance compared to standard yellow brass, always verify flow rates and mineral content. This valve is primarily designed for fresh water or closed-loop systems unless specifically treated for high-salinity intake.

What is the difference between the V43BS-3 and the V43BS-6?
The V43BS-3 is the direct technical replacement. Historically, the -3 carries the specific NAVSEA certification required for naval contracts, whereas the -6 was the standard commercial equivalent.

How do I adjust the opening point of this regulating valve?
Adjustments are made via the range spring screw. Turning the screw increases the pressure required to open the valve, effectively raising the refrigerant head pressure during low ambient or low load conditions.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.